Thickness controllable and mass produced WC@C@Pt hybrid for efficient hydrogen production
| Autor: | Xuanhui Qu, Huang Min, Li Xu, Lina Yue, Ping Li, Suo Guoquan, Wei Wang, Kai Xi, Xiaotong Huo, Zhiwei Liu |
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| Rok vydání: | 2018 |
| Předmět: |
Tafel equation
Materials science Renewable Energy Sustainability and the Environment Carbonation Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Tungsten carbide Water splitting General Materials Science 0210 nano-technology Platinum Carbon Hydrogen production |
| Zdroj: | Energy Storage Materials. 10:268-274 |
| ISSN: | 2405-8297 |
| Popis: | Developing new structures of hydrogen-producing catalyst is essential to the development of electrochemical water splitting. Tungsten carbide-based materials have been widely investigated recently as promising supports to platinum (Pt) for hydrogen evolution reaction (HER). However, the loading capacity and the fixed stability of Pt are still the main problems to be faced with. Herein we demonstrate a strategy which can be used for mass-production for preparing a thickness-controllable double core-shell WC@C@Pt structure, based on a half combustion synthesis-carbonation method. By adjusting the carbon content of the precursors, the thickness of carbon layer covering the surface of tungsten carbide and the insertion depth of Pt particles into the carbon layer are controllable during the carbonation process. The carbon layer can fix the platinum particles as well as improve the electrical conductivity. This unique structure maintains a highly efficient and stable catalytic process, leading to its excellent performance for HER with low overpotentials and small Tafel slopes in acidic/alkaline solution. This study provides some guidelines for the large-scale synthesis of nanostructured electrocatalysts. |
| Databáze: | OpenAIRE |
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